This is my favorite scenerio to fantasize about because I am an introvert gone wrong. So, I guess the question is pretty straight forward. Imagine you wake up one morning, ready to start the day as you would start any other, only to find that you were all alone. You step outside and all of your neighbors are gone too. You walk/drive around for a little bit and realize that your entire town/city is deserted. As far as you know, you are the last person on Earth.
So what is your plan? Do you just commit suicide and end it all, or do you attempt to continue living? If you chose the latter, then explain what your plan would be. I personally would choose to go on because I will be honest with you, this is my ideal fantasy. I would--in a strange way--actually be happy if this happened to me. I dream of total solitude. Anyhow, I would start off first by traveling to the very edge of my town to avoid any potentially dangerous infrastructure failings since there is no one to upkeep any of it. I'd probably look for a new shelter, like a brick or cement house/building. Somethine sturdy that would not deteriorate with time and could hold its own against harsh weather.
After finding the proper place, I would then hijack a diesel truck and head over to a hardware store and take all the supplies and instruction manuals I would need to install a tall chainlink fence with barbed wire around my dwelling to keep out any wild animals and potential bandits if humans were still alive, just to be safe. I imagine I would probably half kill myself trying to figure out how to install this fence since I'm an urban guy, but, I think in such a situation I would succeed.
After that was over with I would take my diesel truck to all of the local grocery stores and load them up with all of the fresh water and non-perishable foods I could find. Chances are the stores would have enough to last me a lifetime. After going through the back breaking process of getting them to my shelter and storing them, I would then head over to the local hardware store and steal a gas generator and a large freezor. I would then install the generator to power the freezer and load the freezer up with fresh meats from the grocery store before they went bad. Chances are that would be my only fresh meat left until I learned how to hunt.
All of that being taken care of, I guess I would then try to discover ways to keep myself occupied for the rest of my life. I'd probably take the truck back to town and load it up with all of the books and CDs I could find, before the elements destroy them all. And then just live the rest of my life in solitude, waiting for something to happen...
Chances are I would go insane--as I think almost everyone would. However, I do think that I would last longer than most people would before reaching total insanity, since I have always been a more introverted person that enjoys being alone.
EDIT: I wonder how this would affect my religious life, since there would be no clergy to serve the Divine Liturgy, I would never be able to receive the Eucharist again...I would probably go steal a bunch of Orthodox books and try to figure out a way to ordain myself as a Priest without technically violating any of the Canons, and then serve the Divine Liturgy by myself for myself.